Re: [PATCH v4] blk-mq: Fix race conditions in request timeout handling

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Hello,

On Tue, Apr 10, 2018 at 11:38:18PM +0800, Ming Lei wrote:
> I agree, the issue should be in driver's irq handler and .timeout in
> theory.
> 
> For example, even though one request has been done by irq handler, .timeout
> still may return RESET_TIMER.

blk-mq can use a separate flag to track normal completions during
timeout and complete the request normally on RESET_TIMER if the flag
is set while EH was in progress.  With a bit of care, we'd be able to
plug the race completely.

Thanks.

-- 
tejun



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